Not sure if this is related. I updated my project from UE 4.19 to 4.22. The 4.19 versions starts well with my GearVR and S7edge. On 4.22 it quits right on start up mentioning possible problems with the app signature. So I rebuilt the OSIG key for my device, placed it into the project files as before, but I keep getting the same message. The project still runs well when tested on pc.